20078077544 has 32 divisors (see below), whose sum is σ = 43034128320. Its totient is φ = 8602955136.

The previous prime is 20078077519. The next prime is 20078077571. The reversal of 20078077544 is 44577087002.

It is a junction number, because it is equal to n+sod(n) for n = 20078077495 and 20078077504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226532 + ... + 302444.

It is an arithmetic number, because the mean of its divisors is an integer number (1344816510).

Almost surely, 2^20078077544 is an apocalyptic number.

It is an amenable number.

20078077544 is an abundant number, since it is smaller than the sum of its proper divisors (22956050776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20078077544 is a wasteful number, since it uses less digits than its factorization.

20078077544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80649 (or 80645 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 44.

The spelling of 20078077544 in words is "twenty billion, seventy-eight million, seventy-seven thousand, five hundred forty-four".